“…A second consideration regarding the use of strong acid solutions is the question of their suitability as a medium for the dichromate titration. Tsubaki (16) reported that 3.5IV hydrochloric acid is the maximum concentration tolerable during the titration of iron(II) with dichromate. The fact that 6¿V acid was used successfully in our procedure may seem to be inconsistent with these findings; however, the original 6N concentration of our acid has been reduced to the acceptable level as a result of the boiling and the addition of rinse water during the transfer of vessels.…”